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Heat causes electrons to move around and distort the current in the fMRI detector, producing thermal noise. Thermal noise rises with the temperature. It also depends on the range of frequencies detected by the receiver coil and its electrical resistance. It affects all voxels similarly, independent of anatomy. [56]
The World Wide Web enabled the spread of information over the Internet through an easy-to-use and flexible format. It thus played an important role in popularising use of the Internet. [49] Although the two terms are sometimes conflated in popular use, World Wide Web is not synonymous with Internet. [50]
MRI Scanner Mark One. The first MRI scanner to be built and used, in Aberdeen Royal Infirmary in Scotland. The history of magnetic resonance imaging (MRI) includes the work of many researchers who contributed to the discovery of nuclear magnetic resonance (NMR) and described the underlying physics of magnetic resonance imaging, starting early in the twentieth century.
Image noise is random variation of brightness or color information in images, and is usually an aspect of electronic noise. It can be produced by the image sensor and circuitry of a scanner or digital camera. Image noise can also originate in film grain and in the unavoidable shot noise of an ideal photon detector. Image noise is an undesirable ...
Modern 3 Tesla clinical MRI scanner.. Magnetic resonance imaging (MRI) is a medical imaging technique mostly used in radiology and nuclear medicine in order to investigate the anatomy and physiology of the body, and to detect pathologies including tumors, inflammation, neurological conditions such as stroke, disorders of muscles and joints, and abnormalities in the heart and blood vessels ...
Dave Raggett showed his testbed web browser Arena and gave a summary of his first HTML+ Internet Draft. [10] He also submitted a paper for VRML. [3]The Biological Sciences Division of the University of Chicago presented a web browser and HTML editor called Phoenix built upon tkWWW version 0.9.
Tim Berners-Lee: Inventor of the World Wide Web (Ferguson's Career Biographies), Melissa Stewart (Ferguson Publishing Company, 2001), ISBN 0-89434-367-X children's biography; How the Web was Born: The Story of the World Wide Web, Robert Cailliau, James Gillies, R. Cailliau (Oxford University Press, 2000), ISBN 0-19-286207-3
Functional connectivity analyses allow the characterization of interregional neural interactions during particular cognitive or motor tasks or merely from spontaneous activity during rest. FMRI and PET enable creation of functional connectivity maps of distinct spatial distributions of temporally correlated brain regions called functional networks.